Means for insulating smoke pipes



April 19, 1927.

L. E. LINHART MEANS FOR INSULATING SMOKE PIPES Filed Sept. 1. 1925 R m Wm M T f T 1 A Patented Apr. 19, 1927.

entree stares PATENT orrlcs.

LENA E. LINHART, 0F DAVTN, MISSOURI, ASSIGNC'R 1'0 Tl-IE BUCKEYEINCUBATOR COMPANY, OF SPRINGFIELD, DHIO, A CORPORATION OF OHIU.

MEANS FOR INSULATING SMOKE PIPES.

This invention relates to a device for insulating smoke pipes,particularly that part of the pipe which is exposed to outsideatmosphere.

The invention has been especially designed i'or the smoke pipes ofstoves employed in brooder houses for chlcks, although not necessarilylimited to that pur-- pose. In the use of brooder stoves it has beencustomary to employ a sheetmetal smoke pipe which extends through theroof or through one of the side walls of the brooder house to outsideatmosphere and trouble has been caused by the accumulation of tar in thepipe probably caused by the condensation of the gas in that part of thepipe which is exposed to outside atmosphere The object oi my inventionis to overcome that difiiculty by insulating that part of the smoke pipewhich is exposed to out side atmosphere, a more particular ob ect of theinvention being to provide a simple form of insulation for the pipewhich can be readily installed on pipes now in use as well as upon pipesof newly erected lorooder houses or newly installed brooder stoves.

In the drawings:

Fig. 1 is a vertical section of a brooder house showing a brooder stoveand its pipe with my improvements applied thereto.

Fig. 2 is a view of the upper portion ot the smoke pipe shown partly invertical section, with one form of insulating device therefor shown invertical section.

Fig. 3 is a similar View to Fig. 2, but showing a modified form ofinsulation.

Fig. 4t is a section on the line l-et of Fig. 2.

lleterring to the drawings 1 represents a brooder house of any wellknown form and E2 the root thereof. The brooder stove is indicated at 8,this stove being a coal burning stove of well known type. It is usual toplace a canopy over the stove but this canopy is not shown in thepresent instance. The smoke pipe of the stove is indicated at -.'l andin the present case passes through an opening in the root 2, this pipebeing formed throughout it length of sheetmetal in the usual u'av. Thepipe extends a considerdistauce above the root into outside atmosphereand it is that portion of the pipe above the root to which my inventionis applied.

Referring to Fig. 2, 5 represents a sheet of metal which is secured tothe roof and covers the opening through the root. This metal sheet iscentrally apertured and there is secured to the edges of the aperture byan ordinary sheetinetal joint a thinible-like sheetinetal member 6preferably of tapered form. When the smoke pipe passes through aslanting root such as illustrated, this thimble is so formed that thevertical axis thereof will extend vertically and be in coaxial relationwith the vertical axis of the smoke pipe 4. and the diameter of thethimble is considerably greater than that of the pipe so as to providean air space. An outer jacket 7 oi sheetmetal has its lower end fittedin telescopic relation with the thimble 6 and extends substantially tothe upper end of the smoke pipe 4. A sheetmetal cap 8 closes the upperend of the jacket 7 and is apertured to receive the smoke pipe 4-, thecap and pipe having a close fit so as to close the upper end of thespace between the pipe and the jacket. In this construction, I have alsoplaced about the upper part of the smoke pipe a covering 9 of sheetasbestos or similar material. In the arrangement shown in Fig. 2 it willbe seen that the upper part of the smoke pipe is covered with asbestosand will be surrounded by an air space which is open only to theinterior of the brooder house so that the air confined therein will bemaintained in a more or less heated condition In Fig. 3 there isemployed the same metal sheet 5 and the. same sheetmetal thiu'ible-likemember 6 which receives the lower end of the jacket, indicated at 7, thejacket being closed at the top by the cap 8. In this modified form,however, the covering 9 of asbestos is eliminated and between the smokepipe, indicated at 4', and the jacket and thimble there is placedasbestos fiber 10 or other similar suitable material. .ln thisconstruction a retaining ring ll of sheetmetal is placed about the pipe4., to retain the packing 10 in position.

By this arrangement that part or the smoke pipe which is exposed tooutside atmosphere will be protected against the chilling effect of theatmosphere so that the sudden condensation of the gases passing throughthe pipe will be avoided and it has been found in practice that thismethod entirely eliminates the tendency for tar to accumulate in thepipe and to run down into the stove.

Having thus described my invention, I claim:

1. The combination, with the smoke pipe of a store located in aninclosing structure, the upper part of which extends through an openingof said structure into outside atmosphere, of a thin'ible-like membersecured to said structure about said opening and through which said pipepasses, and a single jacket of uniform diameter througl out for theupper end of said pipe spaced therefrom to Form an air chamber, theupper end of said jacket being closed to outside atmosphere and thelower end fitted to said thimble with a tight fit to close said jacketto outer air at the lower end thereof, leai 'ing the air chamber formedby said jacket in communication only with the air in said structure.

2. The combination, with a smoke pipe of a stove located in an enclosingstructure, the upper part of which extends through an opening in saidstructure into outside atmosphere, of a thimbledikc member secured tosaid structure about said opening and through which said pipe passes, asingle jacket of uniform diameter throughout for the upper end of saidpipe spaced therefrom to form an air chamber, a cap fitted to theextreme upper end of said jacket and perforated to receive said pipewith a tight fit to close the upper end of said jacket to atmosphere,the lower end of said pipe being fitted to said thimble with a tightiii; to close said jacket to outer air at the lower end thereof, leavingthe air chamber formed by said jacket in comumnication only with the airin said structure.

In testimony whereof, I have hereunto set my hand this 21st day ofriugust, 19:25.

LENA E. LINHART.

